1218493194 has 8 divisors (see below), whose sum is σ = 2436986400. Its totient is φ = 406164396.

The previous prime is 1218493183. The next prime is 1218493219. The reversal of 1218493194 is 4913948121.

It is a sphenic number, since it is the product of 3 distinct primes.

1218493194 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101541094 + ... + 101541105.

It is an arithmetic number, because the mean of its divisors is an integer number (304623300).

Almost surely, 2^1218493194 is an apocalyptic number.

1218493194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218493194 is a wasteful number, since it uses less digits than its factorization.

1218493194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203082204.

The product of its digits is 62208, while the sum is 42.

The square root of 1218493194 is about 34906.9218637221. The cubic root of 1218493194 is about 1068.0896398972.

The spelling of 1218493194 in words is "one billion, two hundred eighteen million, four hundred ninety-three thousand, one hundred ninety-four".